//phpmailer类
require_once("./plugin/phpmailer/class.phpmailer.php");
require_once("./plugin/phpmailer/class.smtp.php");

//自己写的function
function SendMailToClient($client){
    $mail = new PHPMailer();
    
    $mail->IsSMTP();
    $mail->SMTPAuth = true;         // 设置为安全验证方式
    $mail->Host     = "smtp.qq.com";        // SMTP服务器地址
    $mail->Username = "xxxxxx@qq.com";      // 登录用户名
    $mail->Password = "psw";               // 登录密码
    
    $mail->From = "xxxxxx@qq.com";        // 发件人地址(username@163.com)
    $mail->FromName = "发件人名称";    

    $mail->WordWrap   = 50;
    $mail->IsHTML(true);            // 是否支持html邮件，true 或false
           
    $mail->AddAddress("$client");        //客户邮箱地址
    $mail->Subject = "标题";
    $mail->Body    = "文本内容";
    if(!$mail->Send()){
       echo "Message could not be sent. <p>";
       echo "Mailer Error: " . $mail->ErrorInfo;
       return FALSE;
    }
    return TRUE;
}
//方法调用
$client = "client@mail.com";
SendMailToClient($client);